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EN 1.3551 Steel vs. R30155 Cobalt

Both EN 1.3551 steel and R30155 cobalt are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.3551 steel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
220
Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
81
Tensile Strength: Ultimate (UTS), MPa 720
850

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 530
1100
Melting Completion (Liquidus), °C 1490
1470
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 36
12
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
80
Density, g/cm3 7.9
8.5
Embodied Carbon, kg CO2/kg material 4.9
9.7
Embodied Energy, MJ/kg 71
150
Embodied Water, L/kg 82
300

Common Calculations

PREN (Pitting Resistance) 18
37
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 26
28
Strength to Weight: Bending, points 23
24
Thermal Diffusivity, mm2/s 9.8
3.2
Thermal Shock Resistance, points 21
21

Alloy Composition

Carbon (C), % 0.77 to 0.85
0.080 to 0.16
Chromium (Cr), % 3.9 to 4.3
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 88.8 to 91.1
24.3 to 36.2
Manganese (Mn), % 0.15 to 0.35
1.0 to 2.0
Molybdenum (Mo), % 4.0 to 4.5
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0 to 0.25
2.0 to 3.0
Vanadium (V), % 0.9 to 1.1
0